I have 3 ground planes. Say AGND, DGND and PGND. They are meant to be separated entirely, except to only join in them at a single point at where I wanted. However, if I connect them together in the schematic, the rats nets show them to be a single net and any via would connect them unwantedly. How do I distinguish them? I tried separating them in the schematic level, connect each grounds separately in the layout. Once these are done, I connect them together in the schematic and hope I can connect them in PCB Editor, but everything messes up. Does anyone know how to solve this?
Thank you.